| 摘要 |
PROBLEM TO BE SOLVED: To obtain a composition which contains a reduced amount of asbestos or no asbestos and from which an extruded body having good surface smoothness can be obtained even at the time of subjecting the composition to extrusion into an extruded body having a >30 mm thickness. SOLUTION: This composition consists of cement, siliceous aggregate, clay, reinforcing fiber and an extrusion aid, wherein the amount of asbestos that is a kind of reinforcing fiber is equivalent to 0 to 7 pts.wt. based on 100 pts.wt. of the total amount of cement and siliceous aggregate. In the composition, the clay is a combination of antigorite and sericite, and also, the blending ratio of the clay is 5 to 30 pts.wt. in terms of the total of antigorite and sericite to 100 pts.wt. of the total of cement and siliceous aggregate. |
